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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v6 1/5] arm: compile libxenguest
On Fri, 2012-03-02 at 16:25 +0000, Stefano Stabellini wrote:
> Introduce an empty implementation of the arch specific ARM functions in
> xc_dom_arm.c.
> Provide empty implementations of xc_domain_save and xc_domain_restore
> when CONFIG_MIGRATE is not set.
> Move xc_hvm_build.c to xc_hvm_build_x86.c because the implementation is
> x86 specific, introduce xc_hvm_build_arm.c with empty stubs.
>
>
> Changes in v3:
>
> - rename xc_hvm_build.c to xc_hvm_build_x86.c;
>
> - remove xc_nohvm, introduce xc_hvm_build_arm.c instead;
>
>
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> Acked-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
I think I already acked v5 of this patch, did it change substantially?
> ---
> tools/libxc/Makefile | 12 +-
> tools/libxc/xc_dom_arm.c | 50 +++++
> tools/libxc/xc_hvm_build.c | 463
> ----------------------------------------
> tools/libxc/xc_hvm_build_arm.c | 61 ++++++
> tools/libxc/xc_hvm_build_x86.c | 463
> ++++++++++++++++++++++++++++++++++++++++
> tools/libxc/xc_nomigrate.c | 53 +++++
> 6 files changed, 636 insertions(+), 466 deletions(-)
> create mode 100644 tools/libxc/xc_dom_arm.c
> delete mode 100644 tools/libxc/xc_hvm_build.c
> create mode 100644 tools/libxc/xc_hvm_build_arm.c
> create mode 100644 tools/libxc/xc_hvm_build_x86.c
> create mode 100644 tools/libxc/xc_nomigrate.c
>
> diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
> index f2e1ba7..02d39a3 100644
> --- a/tools/libxc/Makefile
> +++ b/tools/libxc/Makefile
> @@ -42,9 +42,12 @@ CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c
>
> GUEST_SRCS-y :=
> GUEST_SRCS-y += xg_private.c xc_suspend.c
> -GUEST_SRCS-$(CONFIG_MIGRATE) += xc_domain_restore.c xc_domain_save.c
> -GUEST_SRCS-$(CONFIG_MIGRATE) += xc_offline_page.c xc_compression.c
> -GUEST_SRCS-$(CONFIG_HVM) += xc_hvm_build.c
> +ifeq ($(CONFIG_MIGRATE),y)
> +GUEST_SRCS-y += xc_domain_restore.c xc_domain_save.c
> +GUEST_SRCS-y += xc_offline_page.c xc_compression.c
> +else
> +GUEST_SRCS-y += xc_nomigrate.c
> +endif
>
> vpath %.c ../../xen/common/libelf
> CFLAGS += -I../../xen/common/libelf
> @@ -61,7 +64,10 @@ GUEST_SRCS-y += xc_dom_compat_linux.c
>
> GUEST_SRCS-$(CONFIG_X86) += xc_dom_x86.c
> GUEST_SRCS-$(CONFIG_X86) += xc_cpuid_x86.c
> +GUEST_SRCS-$(CONFIG_X86) += xc_hvm_build_x86.c
> GUEST_SRCS-$(CONFIG_IA64) += xc_dom_ia64.c
> +GUEST_SRCS-$(CONFIG_ARM) += xc_dom_arm.c
> +GUEST_SRCS-$(CONFIG_ARM) += xc_hvm_build_arm.c
>
> OSDEP_SRCS-y += xenctrl_osdep_ENOSYS.c
>
> diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c
> new file mode 100644
> index 0000000..122d0e8
> --- /dev/null
> +++ b/tools/libxc/xc_dom_arm.c
> @@ -0,0 +1,50 @@
> +/*
> + * Xen domain builder -- ARM
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation;
> + * version 2.1 of the License.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> + *
> + * Copyright (c) 2011, Citrix Systems
> + */
> +#include <inttypes.h>
> +#include <xen/xen.h>
> +#include "xg_private.h"
> +#include "xc_dom.h"
> +
> +int arch_setup_meminit(struct xc_dom_image *dom)
> +{
> + errno = ENOSYS;
> + return -1;
> +}
> +
> +int arch_setup_bootearly(struct xc_dom_image *dom)
> +{
> + DOMPRINTF("%s: doing nothing", __FUNCTION__);
> + return 0;
> +}
> +
> +int arch_setup_bootlate(struct xc_dom_image *dom)
> +{
> + DOMPRINTF("%s: doing nothing", __FUNCTION__);
> + return 0;
> +}
> +/*
> + * Local variables:
> + * mode: C
> + * c-set-style: "BSD"
> + * c-basic-offset: 4
> + * tab-width: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/tools/libxc/xc_hvm_build.c b/tools/libxc/xc_hvm_build.c
> deleted file mode 100644
> index 780b23f..0000000
> --- a/tools/libxc/xc_hvm_build.c
> +++ /dev/null
> @@ -1,463 +0,0 @@
> -/******************************************************************************
> - * xc_hvm_build.c
> - *
> - * This library is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU Lesser General Public
> - * License as published by the Free Software Foundation;
> - * version 2.1 of the License.
> - *
> - * This library is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> - * Lesser General Public License for more details.
> - *
> - * You should have received a copy of the GNU Lesser General Public
> - * License along with this library; if not, write to the Free Software
> - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> - */
> -
> -#include <stddef.h>
> -#include <inttypes.h>
> -#include <stdlib.h>
> -#include <unistd.h>
> -#include <zlib.h>
> -
> -#include "xg_private.h"
> -#include "xc_private.h"
> -
> -#include <xen/foreign/x86_32.h>
> -#include <xen/foreign/x86_64.h>
> -#include <xen/hvm/hvm_info_table.h>
> -#include <xen/hvm/params.h>
> -#include <xen/hvm/e820.h>
> -
> -#include <xen/libelf/libelf.h>
> -
> -#define SUPERPAGE_2MB_SHIFT 9
> -#define SUPERPAGE_2MB_NR_PFNS (1UL << SUPERPAGE_2MB_SHIFT)
> -#define SUPERPAGE_1GB_SHIFT 18
> -#define SUPERPAGE_1GB_NR_PFNS (1UL << SUPERPAGE_1GB_SHIFT)
> -
> -#define SPECIALPAGE_BUFIOREQ 0
> -#define SPECIALPAGE_XENSTORE 1
> -#define SPECIALPAGE_IOREQ 2
> -#define SPECIALPAGE_IDENT_PT 3
> -#define SPECIALPAGE_CONSOLE 4
> -#define NR_SPECIAL_PAGES 5
> -#define special_pfn(x) (0xff000u - NR_SPECIAL_PAGES + (x))
> -
> -static void build_hvm_info(void *hvm_info_page, uint64_t mem_size,
> - uint64_t mmio_start, uint64_t mmio_size)
> -{
> - struct hvm_info_table *hvm_info = (struct hvm_info_table *)
> - (((unsigned char *)hvm_info_page) + HVM_INFO_OFFSET);
> - uint64_t lowmem_end = mem_size, highmem_end = 0;
> - uint8_t sum;
> - int i;
> -
> - if ( lowmem_end > mmio_start )
> - {
> - highmem_end = (1ull<<32) + (lowmem_end - mmio_start);
> - lowmem_end = mmio_start;
> - }
> -
> - memset(hvm_info_page, 0, PAGE_SIZE);
> -
> - /* Fill in the header. */
> - strncpy(hvm_info->signature, "HVM INFO", 8);
> - hvm_info->length = sizeof(struct hvm_info_table);
> -
> - /* Sensible defaults: these can be overridden by the caller. */
> - hvm_info->apic_mode = 1;
> - hvm_info->nr_vcpus = 1;
> - memset(hvm_info->vcpu_online, 0xff, sizeof(hvm_info->vcpu_online));
> -
> - /* Memory parameters. */
> - hvm_info->low_mem_pgend = lowmem_end >> PAGE_SHIFT;
> - hvm_info->high_mem_pgend = highmem_end >> PAGE_SHIFT;
> - hvm_info->reserved_mem_pgstart = special_pfn(0);
> -
> - /* Finish with the checksum. */
> - for ( i = 0, sum = 0; i < hvm_info->length; i++ )
> - sum += ((uint8_t *)hvm_info)[i];
> - hvm_info->checksum = -sum;
> -}
> -
> -static int loadelfimage(
> - xc_interface *xch,
> - struct elf_binary *elf, uint32_t dom, unsigned long *parray)
> -{
> - privcmd_mmap_entry_t *entries = NULL;
> - unsigned long pfn_start = elf->pstart >> PAGE_SHIFT;
> - unsigned long pfn_end = (elf->pend + PAGE_SIZE - 1) >> PAGE_SHIFT;
> - size_t pages = pfn_end - pfn_start;
> - int i, rc = -1;
> -
> - /* Map address space for initial elf image. */
> - entries = calloc(pages, sizeof(privcmd_mmap_entry_t));
> - if ( entries == NULL )
> - goto err;
> -
> - for ( i = 0; i < pages; i++ )
> - entries[i].mfn = parray[(elf->pstart >> PAGE_SHIFT) + i];
> -
> - elf->dest = xc_map_foreign_ranges(
> - xch, dom, pages << PAGE_SHIFT, PROT_READ | PROT_WRITE, 1 <<
> PAGE_SHIFT,
> - entries, pages);
> - if ( elf->dest == NULL )
> - goto err;
> -
> - elf->dest += elf->pstart & (PAGE_SIZE - 1);
> -
> - /* Load the initial elf image. */
> - rc = elf_load_binary(elf);
> - if ( rc < 0 )
> - PERROR("Failed to load elf binary\n");
> -
> - munmap(elf->dest, pages << PAGE_SHIFT);
> - elf->dest = NULL;
> -
> - err:
> - free(entries);
> -
> - return rc;
> -}
> -
> -/*
> - * Check whether there exists mmio hole in the specified memory range.
> - * Returns 1 if exists, else returns 0.
> - */
> -static int check_mmio_hole(uint64_t start, uint64_t memsize,
> - uint64_t mmio_start, uint64_t mmio_size)
> -{
> - if ( start + memsize <= mmio_start || start >= mmio_start + mmio_size )
> - return 0;
> - else
> - return 1;
> -}
> -
> -static int setup_guest(xc_interface *xch,
> - uint32_t dom, const struct xc_hvm_build_args *args,
> - char *image, unsigned long image_size)
> -{
> - xen_pfn_t *page_array = NULL;
> - unsigned long i, nr_pages = args->mem_size >> PAGE_SHIFT;
> - unsigned long target_pages = args->mem_target >> PAGE_SHIFT;
> - uint64_t mmio_start = (1ull << 32) - args->mmio_size;
> - uint64_t mmio_size = args->mmio_size;
> - unsigned long entry_eip, cur_pages, cur_pfn;
> - void *hvm_info_page;
> - uint32_t *ident_pt;
> - struct elf_binary elf;
> - uint64_t v_start, v_end;
> - int rc;
> - xen_capabilities_info_t caps;
> - unsigned long stat_normal_pages = 0, stat_2mb_pages = 0,
> - stat_1gb_pages = 0;
> - int pod_mode = 0;
> -
> - if ( nr_pages > target_pages )
> - pod_mode = 1;
> -
> - memset(&elf, 0, sizeof(elf));
> - if ( elf_init(&elf, image, image_size) != 0 )
> - goto error_out;
> -
> - xc_elf_set_logfile(xch, &elf, 1);
> -
> - elf_parse_binary(&elf);
> - v_start = 0;
> - v_end = args->mem_size;
> -
> - if ( xc_version(xch, XENVER_capabilities, &caps) != 0 )
> - {
> - PERROR("Could not get Xen capabilities");
> - goto error_out;
> - }
> -
> - IPRINTF("VIRTUAL MEMORY ARRANGEMENT:\n"
> - " Loader: %016"PRIx64"->%016"PRIx64"\n"
> - " TOTAL: %016"PRIx64"->%016"PRIx64"\n"
> - " ENTRY ADDRESS: %016"PRIx64"\n",
> - elf.pstart, elf.pend,
> - v_start, v_end,
> - elf_uval(&elf, elf.ehdr, e_entry));
> -
> - if ( (page_array = malloc(nr_pages * sizeof(xen_pfn_t))) == NULL )
> - {
> - PERROR("Could not allocate memory.");
> - goto error_out;
> - }
> -
> - for ( i = 0; i < nr_pages; i++ )
> - page_array[i] = i;
> - for ( i = mmio_start >> PAGE_SHIFT; i < nr_pages; i++ )
> - page_array[i] += mmio_size >> PAGE_SHIFT;
> -
> - /*
> - * Allocate memory for HVM guest, skipping VGA hole 0xA0000-0xC0000.
> - *
> - * We attempt to allocate 1GB pages if possible. It falls back on 2MB
> - * pages if 1GB allocation fails. 4KB pages will be used eventually if
> - * both fail.
> - *
> - * Under 2MB mode, we allocate pages in batches of no more than 8MB to
> - * ensure that we can be preempted and hence dom0 remains responsive.
> - */
> - rc = xc_domain_populate_physmap_exact(
> - xch, dom, 0xa0, 0, 0, &page_array[0x00]);
> - cur_pages = 0xc0;
> - stat_normal_pages = 0xc0;
> - while ( (rc == 0) && (nr_pages > cur_pages) )
> - {
> - /* Clip count to maximum 1GB extent. */
> - unsigned long count = nr_pages - cur_pages;
> - unsigned long max_pages = SUPERPAGE_1GB_NR_PFNS;
> -
> - if ( count > max_pages )
> - count = max_pages;
> -
> - cur_pfn = page_array[cur_pages];
> -
> - /* Take care the corner cases of super page tails */
> - if ( ((cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1)) != 0) &&
> - (count > (-cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1))) )
> - count = -cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1);
> - else if ( ((count & (SUPERPAGE_1GB_NR_PFNS-1)) != 0) &&
> - (count > SUPERPAGE_1GB_NR_PFNS) )
> - count &= ~(SUPERPAGE_1GB_NR_PFNS - 1);
> -
> - /* Attemp to allocate 1GB super page. Because in each pass we only
> - * allocate at most 1GB, we don't have to clip super page boundaries.
> - */
> - if ( ((count | cur_pfn) & (SUPERPAGE_1GB_NR_PFNS - 1)) == 0 &&
> - /* Check if there exists MMIO hole in the 1GB memory range */
> - !check_mmio_hole(cur_pfn << PAGE_SHIFT,
> - SUPERPAGE_1GB_NR_PFNS << PAGE_SHIFT,
> - mmio_start, mmio_size) )
> - {
> - long done;
> - unsigned long nr_extents = count >> SUPERPAGE_1GB_SHIFT;
> - xen_pfn_t sp_extents[nr_extents];
> -
> - for ( i = 0; i < nr_extents; i++ )
> - sp_extents[i] =
> page_array[cur_pages+(i<<SUPERPAGE_1GB_SHIFT)];
> -
> - done = xc_domain_populate_physmap(xch, dom, nr_extents,
> SUPERPAGE_1GB_SHIFT,
> - pod_mode ?
> XENMEMF_populate_on_demand : 0,
> - sp_extents);
> -
> - if ( done > 0 )
> - {
> - stat_1gb_pages += done;
> - done <<= SUPERPAGE_1GB_SHIFT;
> - cur_pages += done;
> - count -= done;
> - }
> - }
> -
> - if ( count != 0 )
> - {
> - /* Clip count to maximum 8MB extent. */
> - max_pages = SUPERPAGE_2MB_NR_PFNS * 4;
> - if ( count > max_pages )
> - count = max_pages;
> -
> - /* Clip partial superpage extents to superpage boundaries. */
> - if ( ((cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1)) != 0) &&
> - (count > (-cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1))) )
> - count = -cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1);
> - else if ( ((count & (SUPERPAGE_2MB_NR_PFNS-1)) != 0) &&
> - (count > SUPERPAGE_2MB_NR_PFNS) )
> - count &= ~(SUPERPAGE_2MB_NR_PFNS - 1); /* clip non-s.p. tail
> */
> -
> - /* Attempt to allocate superpage extents. */
> - if ( ((count | cur_pfn) & (SUPERPAGE_2MB_NR_PFNS - 1)) == 0 )
> - {
> - long done;
> - unsigned long nr_extents = count >> SUPERPAGE_2MB_SHIFT;
> - xen_pfn_t sp_extents[nr_extents];
> -
> - for ( i = 0; i < nr_extents; i++ )
> - sp_extents[i] =
> page_array[cur_pages+(i<<SUPERPAGE_2MB_SHIFT)];
> -
> - done = xc_domain_populate_physmap(xch, dom, nr_extents,
> SUPERPAGE_2MB_SHIFT,
> - pod_mode ?
> XENMEMF_populate_on_demand : 0,
> - sp_extents);
> -
> - if ( done > 0 )
> - {
> - stat_2mb_pages += done;
> - done <<= SUPERPAGE_2MB_SHIFT;
> - cur_pages += done;
> - count -= done;
> - }
> - }
> - }
> -
> - /* Fall back to 4kB extents. */
> - if ( count != 0 )
> - {
> - rc = xc_domain_populate_physmap_exact(
> - xch, dom, count, 0, 0, &page_array[cur_pages]);
> - cur_pages += count;
> - stat_normal_pages += count;
> - }
> - }
> -
> - /* Subtract 0x20 from target_pages for the VGA "hole". Xen will
> - * adjust the PoD cache size so that domain tot_pages will be
> - * target_pages - 0x20 after this call. */
> - if ( pod_mode )
> - rc = xc_domain_set_pod_target(xch, dom, target_pages - 0x20,
> - NULL, NULL, NULL);
> -
> - if ( rc != 0 )
> - {
> - PERROR("Could not allocate memory for HVM guest.");
> - goto error_out;
> - }
> -
> - IPRINTF("PHYSICAL MEMORY ALLOCATION:\n"
> - " 4KB PAGES: 0x%016lx\n"
> - " 2MB PAGES: 0x%016lx\n"
> - " 1GB PAGES: 0x%016lx\n",
> - stat_normal_pages, stat_2mb_pages, stat_1gb_pages);
> -
> - if ( loadelfimage(xch, &elf, dom, page_array) != 0 )
> - goto error_out;
> -
> - if ( (hvm_info_page = xc_map_foreign_range(
> - xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE,
> - HVM_INFO_PFN)) == NULL )
> - goto error_out;
> - build_hvm_info(hvm_info_page, v_end, mmio_start, mmio_size);
> - munmap(hvm_info_page, PAGE_SIZE);
> -
> - /* Allocate and clear special pages. */
> - for ( i = 0; i < NR_SPECIAL_PAGES; i++ )
> - {
> - xen_pfn_t pfn = special_pfn(i);
> - rc = xc_domain_populate_physmap_exact(xch, dom, 1, 0, 0, &pfn);
> - if ( rc != 0 )
> - {
> - PERROR("Could not allocate %d'th special page.", i);
> - goto error_out;
> - }
> - if ( xc_clear_domain_page(xch, dom, special_pfn(i)) )
> - goto error_out;
> - }
> -
> - xc_set_hvm_param(xch, dom, HVM_PARAM_STORE_PFN,
> - special_pfn(SPECIALPAGE_XENSTORE));
> - xc_set_hvm_param(xch, dom, HVM_PARAM_BUFIOREQ_PFN,
> - special_pfn(SPECIALPAGE_BUFIOREQ));
> - xc_set_hvm_param(xch, dom, HVM_PARAM_IOREQ_PFN,
> - special_pfn(SPECIALPAGE_IOREQ));
> - xc_set_hvm_param(xch, dom, HVM_PARAM_CONSOLE_PFN,
> - special_pfn(SPECIALPAGE_CONSOLE));
> -
> - /*
> - * Identity-map page table is required for running with CR0.PG=0 when
> - * using Intel EPT. Create a 32-bit non-PAE page directory of superpages.
> - */
> - if ( (ident_pt = xc_map_foreign_range(
> - xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE,
> - special_pfn(SPECIALPAGE_IDENT_PT))) == NULL )
> - goto error_out;
> - for ( i = 0; i < PAGE_SIZE / sizeof(*ident_pt); i++ )
> - ident_pt[i] = ((i << 22) | _PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
> - _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
> - munmap(ident_pt, PAGE_SIZE);
> - xc_set_hvm_param(xch, dom, HVM_PARAM_IDENT_PT,
> - special_pfn(SPECIALPAGE_IDENT_PT) << PAGE_SHIFT);
> -
> - /* Insert JMP <rel32> instruction at address 0x0 to reach entry point. */
> - entry_eip = elf_uval(&elf, elf.ehdr, e_entry);
> - if ( entry_eip != 0 )
> - {
> - char *page0 = xc_map_foreign_range(
> - xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE, 0);
> - if ( page0 == NULL )
> - goto error_out;
> - page0[0] = 0xe9;
> - *(uint32_t *)&page0[1] = entry_eip - 5;
> - munmap(page0, PAGE_SIZE);
> - }
> -
> - free(page_array);
> - return 0;
> -
> - error_out:
> - free(page_array);
> - return -1;
> -}
> -
> -/* xc_hvm_build:
> - * Create a domain for a virtualized Linux, using files/filenames.
> - */
> -int xc_hvm_build(xc_interface *xch, uint32_t domid,
> - const struct xc_hvm_build_args *hvm_args)
> -{
> - struct xc_hvm_build_args args = *hvm_args;
> - void *image;
> - unsigned long image_size;
> - int sts;
> -
> - if ( domid == 0 )
> - return -1;
> - if ( args.image_file_name == NULL )
> - return -1;
> -
> - if ( args.mem_target == 0 )
> - args.mem_target = args.mem_size;
> -
> - if ( args.mmio_size == 0 )
> - args.mmio_size = HVM_BELOW_4G_MMIO_LENGTH;
> -
> - /* An HVM guest must be initialised with at least 2MB memory. */
> - if ( args.mem_size < (2ull << 20) || args.mem_target < (2ull << 20) )
> - return -1;
> -
> - image = xc_read_image(xch, args.image_file_name, &image_size);
> - if ( image == NULL )
> - return -1;
> -
> - sts = setup_guest(xch, domid, &args, image, image_size);
> -
> - free(image);
> -
> - return sts;
> -}
> -
> -/* xc_hvm_build_target_mem:
> - * Create a domain for a pre-ballooned virtualized Linux, using
> - * files/filenames. If target < memsize, domain is created with
> - * memsize pages marked populate-on-demand,
> - * calculating pod cache size based on target.
> - * If target == memsize, pages are populated normally.
> - */
> -int xc_hvm_build_target_mem(xc_interface *xch,
> - uint32_t domid,
> - int memsize,
> - int target,
> - const char *image_name)
> -{
> - struct xc_hvm_build_args args = {};
> -
> - args.mem_size = (uint64_t)memsize << 20;
> - args.mem_target = (uint64_t)target << 20;
> - args.image_file_name = image_name;
> -
> - return xc_hvm_build(xch, domid, &args);
> -}
> -
> -/*
> - * Local variables:
> - * mode: C
> - * c-set-style: "BSD"
> - * c-basic-offset: 4
> - * tab-width: 4
> - * indent-tabs-mode: nil
> - * End:
> - */
> diff --git a/tools/libxc/xc_hvm_build_arm.c b/tools/libxc/xc_hvm_build_arm.c
> new file mode 100644
> index 0000000..010ebdb
> --- /dev/null
> +++ b/tools/libxc/xc_hvm_build_arm.c
> @@ -0,0 +1,61 @@
> +/******************************************************************************
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation;
> + * version 2.1 of the License.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> + *
> + * Copyright (c) 2011, Citrix Systems
> + */
> +
> +#include <inttypes.h>
> +#include <errno.h>
> +#include <xenctrl.h>
> +#include <xenguest.h>
> +
> +int xc_hvm_build(xc_interface *xch,
> + uint32_t domid,
> + int memsize,
> + const char *image_name)
> +{
> + errno = ENOSYS;
> + return -1;
> +}
> +
> +int xc_hvm_build_target_mem(xc_interface *xch,
> + uint32_t domid,
> + int memsize,
> + int target,
> + const char *image_name)
> +{
> + errno = ENOSYS;
> + return -1;
> +}
> +
> +int xc_hvm_build_mem(xc_interface *xch,
> + uint32_t domid,
> + int memsize,
> + const char *image_buffer,
> + unsigned long image_size)
> +{
> + errno = ENOSYS;
> + return -1;
> +}
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-set-style: "BSD"
> + * c-basic-offset: 4
> + * tab-width: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/tools/libxc/xc_hvm_build_x86.c b/tools/libxc/xc_hvm_build_x86.c
> new file mode 100644
> index 0000000..780b23f
> --- /dev/null
> +++ b/tools/libxc/xc_hvm_build_x86.c
> @@ -0,0 +1,463 @@
> +/******************************************************************************
> + * xc_hvm_build.c
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation;
> + * version 2.1 of the License.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> + */
> +
> +#include <stddef.h>
> +#include <inttypes.h>
> +#include <stdlib.h>
> +#include <unistd.h>
> +#include <zlib.h>
> +
> +#include "xg_private.h"
> +#include "xc_private.h"
> +
> +#include <xen/foreign/x86_32.h>
> +#include <xen/foreign/x86_64.h>
> +#include <xen/hvm/hvm_info_table.h>
> +#include <xen/hvm/params.h>
> +#include <xen/hvm/e820.h>
> +
> +#include <xen/libelf/libelf.h>
> +
> +#define SUPERPAGE_2MB_SHIFT 9
> +#define SUPERPAGE_2MB_NR_PFNS (1UL << SUPERPAGE_2MB_SHIFT)
> +#define SUPERPAGE_1GB_SHIFT 18
> +#define SUPERPAGE_1GB_NR_PFNS (1UL << SUPERPAGE_1GB_SHIFT)
> +
> +#define SPECIALPAGE_BUFIOREQ 0
> +#define SPECIALPAGE_XENSTORE 1
> +#define SPECIALPAGE_IOREQ 2
> +#define SPECIALPAGE_IDENT_PT 3
> +#define SPECIALPAGE_CONSOLE 4
> +#define NR_SPECIAL_PAGES 5
> +#define special_pfn(x) (0xff000u - NR_SPECIAL_PAGES + (x))
> +
> +static void build_hvm_info(void *hvm_info_page, uint64_t mem_size,
> + uint64_t mmio_start, uint64_t mmio_size)
> +{
> + struct hvm_info_table *hvm_info = (struct hvm_info_table *)
> + (((unsigned char *)hvm_info_page) + HVM_INFO_OFFSET);
> + uint64_t lowmem_end = mem_size, highmem_end = 0;
> + uint8_t sum;
> + int i;
> +
> + if ( lowmem_end > mmio_start )
> + {
> + highmem_end = (1ull<<32) + (lowmem_end - mmio_start);
> + lowmem_end = mmio_start;
> + }
> +
> + memset(hvm_info_page, 0, PAGE_SIZE);
> +
> + /* Fill in the header. */
> + strncpy(hvm_info->signature, "HVM INFO", 8);
> + hvm_info->length = sizeof(struct hvm_info_table);
> +
> + /* Sensible defaults: these can be overridden by the caller. */
> + hvm_info->apic_mode = 1;
> + hvm_info->nr_vcpus = 1;
> + memset(hvm_info->vcpu_online, 0xff, sizeof(hvm_info->vcpu_online));
> +
> + /* Memory parameters. */
> + hvm_info->low_mem_pgend = lowmem_end >> PAGE_SHIFT;
> + hvm_info->high_mem_pgend = highmem_end >> PAGE_SHIFT;
> + hvm_info->reserved_mem_pgstart = special_pfn(0);
> +
> + /* Finish with the checksum. */
> + for ( i = 0, sum = 0; i < hvm_info->length; i++ )
> + sum += ((uint8_t *)hvm_info)[i];
> + hvm_info->checksum = -sum;
> +}
> +
> +static int loadelfimage(
> + xc_interface *xch,
> + struct elf_binary *elf, uint32_t dom, unsigned long *parray)
> +{
> + privcmd_mmap_entry_t *entries = NULL;
> + unsigned long pfn_start = elf->pstart >> PAGE_SHIFT;
> + unsigned long pfn_end = (elf->pend + PAGE_SIZE - 1) >> PAGE_SHIFT;
> + size_t pages = pfn_end - pfn_start;
> + int i, rc = -1;
> +
> + /* Map address space for initial elf image. */
> + entries = calloc(pages, sizeof(privcmd_mmap_entry_t));
> + if ( entries == NULL )
> + goto err;
> +
> + for ( i = 0; i < pages; i++ )
> + entries[i].mfn = parray[(elf->pstart >> PAGE_SHIFT) + i];
> +
> + elf->dest = xc_map_foreign_ranges(
> + xch, dom, pages << PAGE_SHIFT, PROT_READ | PROT_WRITE, 1 <<
> PAGE_SHIFT,
> + entries, pages);
> + if ( elf->dest == NULL )
> + goto err;
> +
> + elf->dest += elf->pstart & (PAGE_SIZE - 1);
> +
> + /* Load the initial elf image. */
> + rc = elf_load_binary(elf);
> + if ( rc < 0 )
> + PERROR("Failed to load elf binary\n");
> +
> + munmap(elf->dest, pages << PAGE_SHIFT);
> + elf->dest = NULL;
> +
> + err:
> + free(entries);
> +
> + return rc;
> +}
> +
> +/*
> + * Check whether there exists mmio hole in the specified memory range.
> + * Returns 1 if exists, else returns 0.
> + */
> +static int check_mmio_hole(uint64_t start, uint64_t memsize,
> + uint64_t mmio_start, uint64_t mmio_size)
> +{
> + if ( start + memsize <= mmio_start || start >= mmio_start + mmio_size )
> + return 0;
> + else
> + return 1;
> +}
> +
> +static int setup_guest(xc_interface *xch,
> + uint32_t dom, const struct xc_hvm_build_args *args,
> + char *image, unsigned long image_size)
> +{
> + xen_pfn_t *page_array = NULL;
> + unsigned long i, nr_pages = args->mem_size >> PAGE_SHIFT;
> + unsigned long target_pages = args->mem_target >> PAGE_SHIFT;
> + uint64_t mmio_start = (1ull << 32) - args->mmio_size;
> + uint64_t mmio_size = args->mmio_size;
> + unsigned long entry_eip, cur_pages, cur_pfn;
> + void *hvm_info_page;
> + uint32_t *ident_pt;
> + struct elf_binary elf;
> + uint64_t v_start, v_end;
> + int rc;
> + xen_capabilities_info_t caps;
> + unsigned long stat_normal_pages = 0, stat_2mb_pages = 0,
> + stat_1gb_pages = 0;
> + int pod_mode = 0;
> +
> + if ( nr_pages > target_pages )
> + pod_mode = 1;
> +
> + memset(&elf, 0, sizeof(elf));
> + if ( elf_init(&elf, image, image_size) != 0 )
> + goto error_out;
> +
> + xc_elf_set_logfile(xch, &elf, 1);
> +
> + elf_parse_binary(&elf);
> + v_start = 0;
> + v_end = args->mem_size;
> +
> + if ( xc_version(xch, XENVER_capabilities, &caps) != 0 )
> + {
> + PERROR("Could not get Xen capabilities");
> + goto error_out;
> + }
> +
> + IPRINTF("VIRTUAL MEMORY ARRANGEMENT:\n"
> + " Loader: %016"PRIx64"->%016"PRIx64"\n"
> + " TOTAL: %016"PRIx64"->%016"PRIx64"\n"
> + " ENTRY ADDRESS: %016"PRIx64"\n",
> + elf.pstart, elf.pend,
> + v_start, v_end,
> + elf_uval(&elf, elf.ehdr, e_entry));
> +
> + if ( (page_array = malloc(nr_pages * sizeof(xen_pfn_t))) == NULL )
> + {
> + PERROR("Could not allocate memory.");
> + goto error_out;
> + }
> +
> + for ( i = 0; i < nr_pages; i++ )
> + page_array[i] = i;
> + for ( i = mmio_start >> PAGE_SHIFT; i < nr_pages; i++ )
> + page_array[i] += mmio_size >> PAGE_SHIFT;
> +
> + /*
> + * Allocate memory for HVM guest, skipping VGA hole 0xA0000-0xC0000.
> + *
> + * We attempt to allocate 1GB pages if possible. It falls back on 2MB
> + * pages if 1GB allocation fails. 4KB pages will be used eventually if
> + * both fail.
> + *
> + * Under 2MB mode, we allocate pages in batches of no more than 8MB to
> + * ensure that we can be preempted and hence dom0 remains responsive.
> + */
> + rc = xc_domain_populate_physmap_exact(
> + xch, dom, 0xa0, 0, 0, &page_array[0x00]);
> + cur_pages = 0xc0;
> + stat_normal_pages = 0xc0;
> + while ( (rc == 0) && (nr_pages > cur_pages) )
> + {
> + /* Clip count to maximum 1GB extent. */
> + unsigned long count = nr_pages - cur_pages;
> + unsigned long max_pages = SUPERPAGE_1GB_NR_PFNS;
> +
> + if ( count > max_pages )
> + count = max_pages;
> +
> + cur_pfn = page_array[cur_pages];
> +
> + /* Take care the corner cases of super page tails */
> + if ( ((cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1)) != 0) &&
> + (count > (-cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1))) )
> + count = -cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1);
> + else if ( ((count & (SUPERPAGE_1GB_NR_PFNS-1)) != 0) &&
> + (count > SUPERPAGE_1GB_NR_PFNS) )
> + count &= ~(SUPERPAGE_1GB_NR_PFNS - 1);
> +
> + /* Attemp to allocate 1GB super page. Because in each pass we only
> + * allocate at most 1GB, we don't have to clip super page boundaries.
> + */
> + if ( ((count | cur_pfn) & (SUPERPAGE_1GB_NR_PFNS - 1)) == 0 &&
> + /* Check if there exists MMIO hole in the 1GB memory range */
> + !check_mmio_hole(cur_pfn << PAGE_SHIFT,
> + SUPERPAGE_1GB_NR_PFNS << PAGE_SHIFT,
> + mmio_start, mmio_size) )
> + {
> + long done;
> + unsigned long nr_extents = count >> SUPERPAGE_1GB_SHIFT;
> + xen_pfn_t sp_extents[nr_extents];
> +
> + for ( i = 0; i < nr_extents; i++ )
> + sp_extents[i] =
> page_array[cur_pages+(i<<SUPERPAGE_1GB_SHIFT)];
> +
> + done = xc_domain_populate_physmap(xch, dom, nr_extents,
> SUPERPAGE_1GB_SHIFT,
> + pod_mode ?
> XENMEMF_populate_on_demand : 0,
> + sp_extents);
> +
> + if ( done > 0 )
> + {
> + stat_1gb_pages += done;
> + done <<= SUPERPAGE_1GB_SHIFT;
> + cur_pages += done;
> + count -= done;
> + }
> + }
> +
> + if ( count != 0 )
> + {
> + /* Clip count to maximum 8MB extent. */
> + max_pages = SUPERPAGE_2MB_NR_PFNS * 4;
> + if ( count > max_pages )
> + count = max_pages;
> +
> + /* Clip partial superpage extents to superpage boundaries. */
> + if ( ((cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1)) != 0) &&
> + (count > (-cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1))) )
> + count = -cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1);
> + else if ( ((count & (SUPERPAGE_2MB_NR_PFNS-1)) != 0) &&
> + (count > SUPERPAGE_2MB_NR_PFNS) )
> + count &= ~(SUPERPAGE_2MB_NR_PFNS - 1); /* clip non-s.p. tail
> */
> +
> + /* Attempt to allocate superpage extents. */
> + if ( ((count | cur_pfn) & (SUPERPAGE_2MB_NR_PFNS - 1)) == 0 )
> + {
> + long done;
> + unsigned long nr_extents = count >> SUPERPAGE_2MB_SHIFT;
> + xen_pfn_t sp_extents[nr_extents];
> +
> + for ( i = 0; i < nr_extents; i++ )
> + sp_extents[i] =
> page_array[cur_pages+(i<<SUPERPAGE_2MB_SHIFT)];
> +
> + done = xc_domain_populate_physmap(xch, dom, nr_extents,
> SUPERPAGE_2MB_SHIFT,
> + pod_mode ?
> XENMEMF_populate_on_demand : 0,
> + sp_extents);
> +
> + if ( done > 0 )
> + {
> + stat_2mb_pages += done;
> + done <<= SUPERPAGE_2MB_SHIFT;
> + cur_pages += done;
> + count -= done;
> + }
> + }
> + }
> +
> + /* Fall back to 4kB extents. */
> + if ( count != 0 )
> + {
> + rc = xc_domain_populate_physmap_exact(
> + xch, dom, count, 0, 0, &page_array[cur_pages]);
> + cur_pages += count;
> + stat_normal_pages += count;
> + }
> + }
> +
> + /* Subtract 0x20 from target_pages for the VGA "hole". Xen will
> + * adjust the PoD cache size so that domain tot_pages will be
> + * target_pages - 0x20 after this call. */
> + if ( pod_mode )
> + rc = xc_domain_set_pod_target(xch, dom, target_pages - 0x20,
> + NULL, NULL, NULL);
> +
> + if ( rc != 0 )
> + {
> + PERROR("Could not allocate memory for HVM guest.");
> + goto error_out;
> + }
> +
> + IPRINTF("PHYSICAL MEMORY ALLOCATION:\n"
> + " 4KB PAGES: 0x%016lx\n"
> + " 2MB PAGES: 0x%016lx\n"
> + " 1GB PAGES: 0x%016lx\n",
> + stat_normal_pages, stat_2mb_pages, stat_1gb_pages);
> +
> + if ( loadelfimage(xch, &elf, dom, page_array) != 0 )
> + goto error_out;
> +
> + if ( (hvm_info_page = xc_map_foreign_range(
> + xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE,
> + HVM_INFO_PFN)) == NULL )
> + goto error_out;
> + build_hvm_info(hvm_info_page, v_end, mmio_start, mmio_size);
> + munmap(hvm_info_page, PAGE_SIZE);
> +
> + /* Allocate and clear special pages. */
> + for ( i = 0; i < NR_SPECIAL_PAGES; i++ )
> + {
> + xen_pfn_t pfn = special_pfn(i);
> + rc = xc_domain_populate_physmap_exact(xch, dom, 1, 0, 0, &pfn);
> + if ( rc != 0 )
> + {
> + PERROR("Could not allocate %d'th special page.", i);
> + goto error_out;
> + }
> + if ( xc_clear_domain_page(xch, dom, special_pfn(i)) )
> + goto error_out;
> + }
> +
> + xc_set_hvm_param(xch, dom, HVM_PARAM_STORE_PFN,
> + special_pfn(SPECIALPAGE_XENSTORE));
> + xc_set_hvm_param(xch, dom, HVM_PARAM_BUFIOREQ_PFN,
> + special_pfn(SPECIALPAGE_BUFIOREQ));
> + xc_set_hvm_param(xch, dom, HVM_PARAM_IOREQ_PFN,
> + special_pfn(SPECIALPAGE_IOREQ));
> + xc_set_hvm_param(xch, dom, HVM_PARAM_CONSOLE_PFN,
> + special_pfn(SPECIALPAGE_CONSOLE));
> +
> + /*
> + * Identity-map page table is required for running with CR0.PG=0 when
> + * using Intel EPT. Create a 32-bit non-PAE page directory of superpages.
> + */
> + if ( (ident_pt = xc_map_foreign_range(
> + xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE,
> + special_pfn(SPECIALPAGE_IDENT_PT))) == NULL )
> + goto error_out;
> + for ( i = 0; i < PAGE_SIZE / sizeof(*ident_pt); i++ )
> + ident_pt[i] = ((i << 22) | _PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
> + _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
> + munmap(ident_pt, PAGE_SIZE);
> + xc_set_hvm_param(xch, dom, HVM_PARAM_IDENT_PT,
> + special_pfn(SPECIALPAGE_IDENT_PT) << PAGE_SHIFT);
> +
> + /* Insert JMP <rel32> instruction at address 0x0 to reach entry point. */
> + entry_eip = elf_uval(&elf, elf.ehdr, e_entry);
> + if ( entry_eip != 0 )
> + {
> + char *page0 = xc_map_foreign_range(
> + xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE, 0);
> + if ( page0 == NULL )
> + goto error_out;
> + page0[0] = 0xe9;
> + *(uint32_t *)&page0[1] = entry_eip - 5;
> + munmap(page0, PAGE_SIZE);
> + }
> +
> + free(page_array);
> + return 0;
> +
> + error_out:
> + free(page_array);
> + return -1;
> +}
> +
> +/* xc_hvm_build:
> + * Create a domain for a virtualized Linux, using files/filenames.
> + */
> +int xc_hvm_build(xc_interface *xch, uint32_t domid,
> + const struct xc_hvm_build_args *hvm_args)
> +{
> + struct xc_hvm_build_args args = *hvm_args;
> + void *image;
> + unsigned long image_size;
> + int sts;
> +
> + if ( domid == 0 )
> + return -1;
> + if ( args.image_file_name == NULL )
> + return -1;
> +
> + if ( args.mem_target == 0 )
> + args.mem_target = args.mem_size;
> +
> + if ( args.mmio_size == 0 )
> + args.mmio_size = HVM_BELOW_4G_MMIO_LENGTH;
> +
> + /* An HVM guest must be initialised with at least 2MB memory. */
> + if ( args.mem_size < (2ull << 20) || args.mem_target < (2ull << 20) )
> + return -1;
> +
> + image = xc_read_image(xch, args.image_file_name, &image_size);
> + if ( image == NULL )
> + return -1;
> +
> + sts = setup_guest(xch, domid, &args, image, image_size);
> +
> + free(image);
> +
> + return sts;
> +}
> +
> +/* xc_hvm_build_target_mem:
> + * Create a domain for a pre-ballooned virtualized Linux, using
> + * files/filenames. If target < memsize, domain is created with
> + * memsize pages marked populate-on-demand,
> + * calculating pod cache size based on target.
> + * If target == memsize, pages are populated normally.
> + */
> +int xc_hvm_build_target_mem(xc_interface *xch,
> + uint32_t domid,
> + int memsize,
> + int target,
> + const char *image_name)
> +{
> + struct xc_hvm_build_args args = {};
> +
> + args.mem_size = (uint64_t)memsize << 20;
> + args.mem_target = (uint64_t)target << 20;
> + args.image_file_name = image_name;
> +
> + return xc_hvm_build(xch, domid, &args);
> +}
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-set-style: "BSD"
> + * c-basic-offset: 4
> + * tab-width: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/tools/libxc/xc_nomigrate.c b/tools/libxc/xc_nomigrate.c
> new file mode 100644
> index 0000000..e734d73
> --- /dev/null
> +++ b/tools/libxc/xc_nomigrate.c
> @@ -0,0 +1,53 @@
> +/******************************************************************************
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation;
> + * version 2.1 of the License.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> + *
> + * Copyright (c) 2011, Citrix Systems
> + */
> +
> +#include <inttypes.h>
> +#include <errno.h>
> +#include <xenctrl.h>
> +#include <xenguest.h>
> +
> +int xc_domain_save(xc_interface *xch, int io_fd, uint32_t dom, uint32_t
> max_iters,
> + uint32_t max_factor, uint32_t flags,
> + struct save_callbacks* callbacks, int hvm,
> + unsigned long vm_generationid_addr)
> +{
> + errno = ENOSYS;
> + return -1;
> +}
> +
> +int xc_domain_restore(xc_interface *xch, int io_fd, uint32_t dom,
> + unsigned int store_evtchn, unsigned long *store_mfn,
> + domid_t store_domid, unsigned int console_evtchn,
> + unsigned long *console_mfn, domid_t console_domid,
> + unsigned int hvm, unsigned int pae, int superpages,
> + int no_incr_generationid,
> + unsigned long *vm_generationid_addr)
> +{
> + errno = ENOSYS;
> + return -1;
> +}
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-set-style: "BSD"
> + * c-basic-offset: 4
> + * tab-width: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> --
> 1.7.2.5
>
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